Improvement in stereoscopes



P. MU B PHY.

Stereuscopes.

2 Sheets--Sheet 1.

Patgnted Feb. 25,1873x 2 Sheets--Sheet 2.

P. M U RPHY.

Stereoscopes.

fil -135,333 Patented Feb. 25,1873.

AM PHOTO-LITHOGRAPIIIO 00. AM (oaazmnsb ma sass) UNITED STATES PATENTOFFICE.

PETER MURPHY, OF NEW YORK, N. Y.

IMPROVEMENT IN STEREOSCOPES.

Specification forming part of Letters Patent No. 136,333, dated February25, 1873.

To all whom it may concern:

Beit known that I, PETER MURPHY, of the city and State of New York, haveinvented an Improvement in Stereoscope-Instruments, of which thefollowing is a specification:

This instrument is made to fold in such a manner as to be packed into asmall compass for transportation, but when opened out for use, thestereoscope possesses all the features usually found in suchinstruments. The central bar of the instrument is hinged so as to foldback beneath the hood, and when extended the parts are held in place byscrewing the handle into the partition or septum between the glasses,which is also movable.

In the drawing, Figure 1 is a sectional plan of the hood, showing, also,the parts folded and packed for transportation; Fig. 2 is a side view ofthe instrument in position for use; and Fig. 3 is a side View of theinstrument folded.

The hood a, base I), and lenses 0 c, are of any usual or desired kind orsize, and the picture-holder d is made to slide upon the central bar 0,as usual. This bar e, instead of being connected permanently to the baseor body b, as usual, is hinged so as to be folded into a compasscorresponding to the measurements of the hood and holder, or nearly so.I find that it is convenient to employ two joints or hinges, i k, andthe intermediate link I, so that the parts can be turned around into theposition shown in Fig. 1, and packed together. The partition or septum mis made with a bottom piece, resting upon the link Z and fill ing thespace between the end of the bar 0 and the side of the body I), so as toprevent the bar 0 swinging or folding while in use. The handle a is madewith a screw-thread, that enters a nut in the bottom piece of the septumm, so as to hold the parts firmly together, said handle passing througha hole in the link Z.

The joints in the bar 0 may be of any desired character, either a ruleor knuckle joint, or made by a rivet or screw.

The instrument made in this manner is cheap, easily constructed, strong,and can be easily folded and packed into a verysmall compass, asindicated in Fig. 1.

I claim as my invention- The bar 0 and link l, hinged together and tothe body 11, in combination with the removable partition m and handle41, as and for the purposes set forth.

Signed by me this 19th day of October, A. D. 1872.

PETER MURPHY. I

Witnesses GEo. T. PINoKNEY, UHA s. H. SMITH.

